Note
Go to the end to download the full example code.
KeyPressAndRelease demo#
This example demonstrates gathering key-releases as well as presses with the ExperimentController class.
Please note that this currently only works for the keyboard, which has inprecise timing.
exp_name: KeyPressAndReleaseDemo
date: 2024-10-08 13_42_45.413769
file: /home/circleci/project/examples/experiments/keyrelease.py
participant: foo
session: 001
2024-10-08 13:42:45,413 - INFO - Expyfun: Using version 2.0.0.dev0 (requested dev)
2024-10-08 13:42:45,414 - INFO - Expyfun: Setting up sound card using pyglet backend with 2 playback channels
2024-10-08 13:42:45,611 - WARNING - Expyfun: Mismatch between reported stim sample rate (24414) and device sample rate (44100.0). Experiment Controller will resample for you, but this takes a non-trivial amount of processing time and may compromise your experimental timing and/or cause artifacts.
2024-10-08 13:42:45,611 - INFO - Expyfun: Setting up screen
2024-10-08 13:42:45,641 - EXP - Expyfun: Set screen visibility True
2024-10-08 13:42:45,653 - INFO - Initialized [1280 960] window on screen XlibScreen(display=<pyglet.canvas.xlib.XlibDisplay object at 0x7f392c363f10>, x=0, y=0, width=1400, height=900, xinerama=0) with DPI 69.73
2024-10-08 13:42:45,653 - INFO - Expyfun: Initializing dummy triggering mode
2024-10-08 13:42:45,654 - INFO - Expyfun: Initialization complete
2024-10-08 13:42:45,655 - EXP - Expyfun: Participant: foo
2024-10-08 13:42:45,655 - EXP - Expyfun: Session: 001
2024-10-08 13:42:46,735 - INFO - Expyfun: Exiting
2024-10-08 13:42:46,738 - EXP - Expyfun: Audio stopped and reset.
# Author: Jasper van den Bosch <jasperb@uw.edu>
#
# License: BSD (3-clause)
from expyfun import ExperimentController, building_doc
from expyfun import analyze as ea
print(__doc__)
isi = 0.5
wait_dur = 3.0 if not building_doc else 0.0
msg_dur = 3.0 if not building_doc else 0.0
with ExperimentController(
"KeyPressAndReleaseDemo",
screen_num=0,
window_size=[1280, 960],
full_screen=False,
stim_db=0,
noise_db=0,
output_dir=None,
participant="foo",
session="001",
version="dev",
response_device="keyboard",
) as ec:
ec.wait_secs(isi)
###########################################
# listen_presses / while loop / get_presses(kind='both')
instruction = (
"Press and release some keys\n\nlisten_presses()"
"\nwhile loop {}\n"
"get_presses(kind='both', return_kinds=True)"
)
disp_time = wait_dur
countdown = ec.current_time + disp_time
ec.call_on_next_flip(ec.listen_presses)
ec.screen_text(instruction.format(disp_time))
screenshot = ec.screenshot()
ec.flip()
while ec.current_time < countdown:
cur_time = round(countdown - ec.current_time, 1)
if cur_time != disp_time:
disp_time = cur_time
# redraw text with updated disp_time
ec.screen_text(instruction.format(disp_time))
ec.flip()
events = ec.get_presses(kind="both", return_kinds=True)
ec.write_data_line("listen / while / get_presses", events)
if not len(events):
message = "no keys pressed"
else:
message = [f"{k} {r} after {round(t, 4)} secs\n" "" for k, t, r in events]
message = "".join(message)
ec.screen_prompt(message, msg_dur)
ec.wait_secs(isi)
ea.plot_screen(screenshot)
Total running time of the script: (0 minutes 1.406 seconds)